the winds blow from the temperate region passing the South China Sea penetrating to the tropical region (Chen et al., 2000). It also has possible relation to the El Niño–Southern Oscillation (ENSO), and the strong EAWM would enhance the ascending air over the equatorial area (Zeng et al., 2011). These will affect on precipitation over some areas of the Indochina or related to the rainfall variability over the Indochina whether or not?